Tall an' handsome

An update by Feral to the Linux version of M2TW instructs user to update their OS (to 10.14) by way of being incompatible.

Not everyone wants to update so here is a relatively simple fix:

The file to edit is "/Users/yourusername/Library/Application Support/Steam/steamapps/common/Medieval II Total War/Medieval II Total War.app/Contents/Resources/specifications.xml".

Make a back up copy, just in case.

Search for "10.14" in there, ...

As of a couple of hours ago the Steam workshop has been giving problems - it manifests itself as showing a zero file size for assorted mods and subscribing won't do anything. A related problem is that you may not be able to remove the mod if you are already subscribed - other then manually removing it.

If you have a mod like that contact it's author and make him aware of the solution underneath:

Simply modify your upload to change the byte size and then push it to Steam ...